245/40R17 tire size in inches
A 245/40R17 tire measures
24.7" tall × 9.6" wide
3.86" sidewall on a 17" wheel. 816 revolutions per mile.
245/40R17 means a tire 245 mm wide, with sidewalls 40% as tall as the tire is wide (98 mm), radial construction (R), for a 17 inch wheel.
245/40R17 specs
| Overall diameter (height) | 24.72 inches (628 mm) |
|---|---|
| Section width | 9.65 inches (245 mm) |
| Sidewall height | 3.86 inches (98 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 77.6 inches (1,972 mm) |
| Revolutions per mile | 816 |
| Revolutions per kilometer | 507 |
| Approximate rim width | 8.0" to 9.5" |
| In inches (flotation style) | 24.7x9.6R17 |
| Aspect ratio | 40% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 245/40R17 on a 17" wheel
These 17" sizes are within 3% of 245/40R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 195/50R17 | 24.68" | 7.68" | −0.2% | 59.9 mph | Compare |
| 215/45R17 | 24.62" | 8.46" | −0.4% | 59.8 mph | Compare |
| 275/35R17 | 24.58" | 10.83" | −0.6% | 59.7 mph | Compare |
| 285/35R17 | 24.85" | 11.22" | +0.6% | 60.3 mph | Compare |
| 225/45R17 | 24.97" | 8.86" | +1.0% | 60.6 mph | Compare |
| 185/55R17 | 25.01" | 7.28" | +1.2% | 60.7 mph | Compare |
| 235/40R17 | 24.40" | 9.25" | −1.3% | 59.2 mph | Compare |
| 255/40R17 | 25.03" | 10.04" | +1.3% | 60.8 mph | Compare |
| 205/50R17 | 25.07" | 8.07" | +1.4% | 60.9 mph | Compare |
| 265/35R17 | 24.30" | 10.43" | −1.7% | 59.0 mph | Compare |
| 295/35R17 | 25.13" | 11.61" | +1.7% | 61.0 mph | Compare |
| 185/50R17 | 24.28" | 7.28" | −1.8% | 58.9 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 175/85R13 | 13" | 24.71" | 0.0% | Compare |
| 185/60R16 | 16" | 24.74" | +0.1% | Compare |
| 165/75R15 | 15" | 24.74" | +0.1% | Compare |
| 225/55R15 | 15" | 24.74" | +0.1% | Compare |
| 275/45R15 | 15" | 24.74" | +0.1% | Compare |
| 195/70R14 | 14" | 24.75" | +0.1% | Compare |
| 205/60R15 | 15" | 24.69" | −0.1% | Compare |
| 245/45R16 | 16" | 24.68" | −0.1% | Compare |
| 245/35R18 | 18" | 24.75" | +0.1% | Compare |
| 215/40R18 | 18" | 24.77" | +0.2% | Compare |
| 275/40R16 | 16" | 24.66" | −0.2% | Compare |
| 185/80R13 | 13" | 24.65" | −0.3% | Compare |
One size up or down
- 235/40R17narrower: 24.4" × 9.3"
- 255/40R17wider: 25.0" × 10.0"
- 245/35R17lower profile: 23.8" × 9.6"
- 245/45R17taller sidewall: 25.7" × 9.6"
Compare 245/40R17 with another size
Questions
- How tall is a 245/40R17 tire?
- A 245/40R17 tire is 24.7 inches tall (628 mm), calculated from the size. It is 9.6 inches wide with 3.9 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 245/40R17 mean?
- 245/40R17 means a tire 245 mm wide, with sidewalls 40% as tall as the tire is wide (98 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 245/40R17 tire make?
- About 816 revolutions per mile, based on a circumference of 77.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 245/40R17 tire?
- Roughly 8.0" to 9.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 195/50R17 instead of 245/40R17?
- 195/50R17 is −0.04 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.